Accessory for a portable battery



FIG. 1 is a perspective view of an accessory for a portable battery, showing my new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being identical thereto;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a right-side elevational view thereof, the left-side elevational view being identical thereto.

The broken lines shown in the drawings illustrate portions of the accessory for a portable battery that are environmental structures and form no part of the claimed design. Grayscale shading illustrates contour, not any particular color. 

CLAIM The ornamental design for an accessory for a portable battery, as shown and described. 